QVariant::ConstReference Class
template <typename Indirect> class QVariant::ConstReferenceThe QVariant::ConstReference acts as a const reference to a QVariant. More...
This class was introduced in Qt 6.11.
Public Functions
| ConstReference(Indirect &&referred) | |
| ConstReference(QVariant::Reference<Indirect> &&nonConst) | |
| ConstReference(const Indirect &referred) | |
| ConstReference(const QVariant::Reference<Indirect> &nonConst) | |
| ConstReference(const QVariant::ConstReference<Indirect> &) | |
| ConstReference(QVariant::ConstReference<Indirect> &&) | |
| ~ConstReference() | |
| QVariant | operator QVariant() const |
| QVariant::ConstReference<Indirect> & | operator=(QVariant::ConstReference<Indirect> &&value) |
| QVariant::ConstReference<Indirect> & | operator=(const QVariant::ConstReference<Indirect> &value) |
Detailed Description
As the generic iterators don't actually instantiate a QVariant on each step, they cannot return a reference to one from operator*(). QVariant::ConstReference<Indirect> provides the same functionality as an actual reference to a QVariant would, but is backed by a referred-to value of type Indirect. The template is implemented for QMetaSequence::ConstIterator, QMetaSequence::Iterator, QMetaAssociation::ConstIterator, and QMetaAssociation::Iterator.
Member Function Documentation
[explicit noexcept(...)] ConstReference::ConstReference(Indirect &&referred)
Creates a QVariant::ConstReference from a referred.
Note: This function is noexcept when std::is_nothrow_move_constructible_v<Indirect> is true.
[implicit] ConstReference::ConstReference(QVariant::Reference<Indirect> &&nonConst)
Creates a QVariant::ConstReference from a nonConst Reference.
[explicit noexcept(...)] ConstReference::ConstReference(const Indirect &referred)
Creates a QVariant::ConstReference from a referred.
Note: This function is noexcept when std::is_nothrow_copy_constructible_v<Indirect> is true.
[noexcept(...)] ConstReference::ConstReference(const QVariant::Reference<Indirect> &nonConst)
Creates a QVariant::ConstReference from a nonConst Reference.
Note: This function is noexcept when std::is_nothrow_copy_constructible_v<Indirect> is true.
[noexcept(...) default] ConstReference::ConstReference(const QVariant::ConstReference<Indirect> &)
Copy-constructs an instance of ConstReference.
Note: This function is noexcept when std::is_nothrow_copy_constructible_v<Indirect> is true.
[delete] ConstReference::ConstReference(QVariant::ConstReference<Indirect> &&)
Move-constructs an instance of ConstReference. This function is deleted.
[default] ConstReference::~ConstReference()
Destroys the instance of ConstReference.
[noexcept(...)] QVariant ConstReference::operator QVariant() const
Dereferences the reference to a QVariant. This method needs to be specialized for each Indirect type. It is pre-defined for QMetaSequence::ConstIterator, QMetaSequence::Iterator, QMetaAssociation::ConstIterator, and QMetaAssociation::Iterator.
Note: This function is noexcept when Indirect::CanNoexceptConvertToQVariant is true.
[delete] QVariant::ConstReference<Indirect> &ConstReference::operator=(QVariant::ConstReference<Indirect> &&value)
Move-assigns value to this ConstReference instance. This function is deleted.
[delete] QVariant::ConstReference<Indirect> &ConstReference::operator=(const QVariant::ConstReference<Indirect> &value)
Copy-assigns value to this ConstReference instance. This function is deleted.
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